PATCH: Add imagesoft really to rosapps (and compile it)

This patch does the following:

• moves the 'imagesoft' application from rosapps/templates/imagesoft to
  rosapps/applications/imagesoft since it is not just a template of something,
  but an application which needs to be improved a lot ;
• adds the 'imagesoft' application to compilation : create a CMakeLists.txt
  file ;
• modifies the language files from ANSI to UNICODE (and corrects a bug in those
  files) ;
• avoids unnecessary and prejudiciable variable-casts and makes the application
  x64 compliant (remove all the x64 warnings) ;
• and does few code making-up.